fix errors in codeigniter app

fix validation for forms add user, add admin/subadmin, edit users fix add document validation/upload issue does not validate document type or show error or success message. docs saves twice in database. edit docs/delete not working fix doc count view issue for user/admins Fix redirection of sub-admin to his own dashbaord fix user role issue not properly storing in DB. a column in user table in DB fix documents viewed column for admin/sub-admin, and delete/update